In order for a stand-on vessel to take action in a situation, she must determine that the other vessel ______.
A.is restricted in her ability to maneuver
B.has sounded the danger signal
C.is not taking appropriate action
D.has not changed course since risk of collision was determined
正确答案：C
在一个会遇情形中为了使直航船采取行动她必须确定她船没有正在采取适当的行动
